﻿using SpendingMonitor.Common;
using SpendingMonitor.Log;
using SpendingMonitor.Models;
using SpendingMonitor.Views;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// The Basic Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234237

namespace SpendingMonitor
{
    /// <summary>
    /// A basic page that provides characteristics common to most applications.
    /// </summary>
    public sealed partial class MainPage : Page
    {

        private NavigationHelper navigationHelper;
        private ObservableDictionary defaultViewModel = new ObservableDictionary();

        #region default view model
        /// <summary>
        /// This can be changed to a strongly typed view model.
        /// </summary>
        public ObservableDictionary DefaultViewModel
        {
            get { return this.defaultViewModel; }
        }
        #endregion

        #region navigation helper
        /// <summary>
        /// NavigationHelper is used on each page to aid in navigation and 
        /// process lifetime management
        /// </summary>
        public NavigationHelper NavigationHelper
        {
            get { return this.navigationHelper; }
        }

        /// <summary>
        /// Populates the page with content passed during navigation. Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="sender">
        /// The source of the event; typically <see cref="NavigationHelper"/>
        /// </param>
        /// <param name="e">Event data that provides both the navigation parameter passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
        /// a dictionary of state preserved by this page during an earlier
        /// session. The state will be null the first time a page is visited.</param>
        private void navigationHelper_LoadState(object sender, LoadStateEventArgs e) { }

        /// <summary>
        /// Preserves state associated with this page in case the application is suspended or the
        /// page is discarded from the navigation cache.  Values must conform to the serialization
        /// requirements of <see cref="SuspensionManager.SessionState"/>.
        /// </summary>
        /// <param name="sender">The source of the event; typically <see cref="NavigationHelper"/></param>
        /// <param name="e">Event data that provides an empty dictionary to be populated with
        /// serializable state.</param>
        private void navigationHelper_SaveState(object sender, SaveStateEventArgs e) { }
        #endregion

        #region bootstrap
        public MainPage()
        {
            this.InitializeComponent();            
            this.navigationHelper = new NavigationHelper(this);
            this.navigationHelper.LoadState += navigationHelper_LoadState;
            this.navigationHelper.SaveState += navigationHelper_SaveState;
        }
        #endregion       

        #region NavigationHelper registration
        /// The methods provided in this section are simply used to allow
        /// NavigationHelper to respond to the page's navigation methods.
        /// 
        /// Page specific logic should be placed in event handlers for the  
        /// <see cref="GridCS.Common.NavigationHelper.LoadState"/>
        /// and <see cref="GridCS.Common.NavigationHelper.SaveState"/>.
        /// The navigation parameter is available in the LoadState method 
        /// in addition to page state preserved during an earlier session.

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            navigationHelper.OnNavigatedTo(e);
        }

        protected override void OnNavigatedFrom(NavigationEventArgs e)
        {
            navigationHelper.OnNavigatedFrom(e);
        }

        #endregion

        #region page events
        /// <summary>
        /// This event makes use of the button content to create the full assembly name of the page 
        /// to be navigated to. By using this design all button navigation can be done using the 
        /// same method; therefore eliminating the use of several event methods.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void NavigationButton_Click(object sender, RoutedEventArgs e)
        {
            Button btn = sender as Button;
            if (ReferenceEquals(btn, null))
            {
                SpendingMonitor.App.Prompt("Error Occured. See the logfiles located at: ");
                MetroEventSource.Log.Error("The sender object could not be cast to a button.");
            }
            string uncleanPageName = btn.Content as String;
            if (uncleanPageName.Equals("Settings"))
            {
                BottomAppBar.IsOpen = true;
            }
            else
            {
                string pageName = "SpendingMonitor.Views." + (uncleanPageName.Replace(" ", "")) + "Page";                
                if (Frame != null)
                {
                    Type pageType = Type.GetType(pageName);
                    this.Frame.Navigate(pageType);
                }
            }
        }

        /// <summary>
        /// Drop the whole database
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void FullResetButton_Click(object sender, RoutedEventArgs e)
        {
            bool success = false;
            MetroEventSource.Log.Info("Start full data reset");
            using (var db = new SQLite.SQLiteConnection(SpendingMonitor.App.DBPath))
            {
                db.DeleteAll<Payment>();
                db.DeleteAll<Retailer>();
                db.DeleteAll<Category>();
                db.DeleteAll<PaymentMethod>();
                SpendingMonitor.App.Prompt("All data has been deleted successfully");
                MetroEventSource.Log.Info("Full data reset has completed.");

                success = true;
            }
            if (!success)
            {
                SpendingMonitor.App.Prompt("Data reset not success");
                MetroEventSource.Log.Error("Full data reset failed.");
            }
        }

        /// <summary>
        /// Drop the payment table
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void DeletePaymentsButton_Click(object sender, RoutedEventArgs e)
        {
            MetroEventSource.Log.Info("Deleting all payment entries.");
            using (var db = new SQLite.SQLiteConnection(SpendingMonitor.App.DBPath))
            {
                db.DeleteAll<Payment>();
                SpendingMonitor.App.Prompt("Payments have been deleted successfully");
                MetroEventSource.Log.Info("Payments entries deleted successfully");
            }
            //TODO: Log issue
            SpendingMonitor.App.Prompt("Deleting of payment entries not successfull");
            MetroEventSource.Log.Error("Not able to delete payments entries");
        }
        #endregion
    }
}
